Src inhibitor reduces permeability without disturbing vascularization and prevents bone destruction in steroid-associated osteonecrotic lesions in rabbits

Sci Rep. 2015 Mar 9:5:8856. doi: 10.1038/srep08856.

Abstract

To examine the therapeutic effect of Src inhibitor on the VEGF mediating vascular hyperpermeability and bone destruction within steroid-associated osteonecrotic lesions in rabbits. Rabbits with high risk for progress to destructive repair in steroid-associated osteonecrosis were selected according to our published protocol. The selected rabbits were systemically administrated with either Anti-VEGF antibody (Anti-VEGF Group) or Src inhibitor (Src-Inhibition Group) or VEGF (VEGF-Supplement Group) or a combination of VEGF and Src inhibitor (Supplement &Inhibition Group) or control vehicle (Control Group) for 4 weeks. At 0, 2 and 4 weeks after administration, in vivo dynamic MRI, micro-CT based-angiography, histomorphometry and immunoblotting were employed to evaluate the vascular and skeletal events in different groups. The incidence of the destructive repair in the Anti-VEGF Group, Src-Inhibition Group and Supplement &Inhibition Group was all significantly lower than that in the Control Group. The angiogenesis was promoted in VEGF-Supplement Group, Src-Inhibition Group and Supplement &Inhibition Group, while the hyperpermeability was inhibited in Anti-VEGF Group, Src-Inhibition Group and Supplement &Inhibition Group. The trabecular structure was improved in Src-Inhibition Group and Supplement &Inhibition Group. Src inhibitor could reduce permeability without disturbing vascularization and prevent destructive repair in steroid-associated osteonecrosis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Neovascularization, Pathologic / physiopathology
  • Neovascularization, Pathologic / prevention & control*
  • Osteonecrosis / chemically induced*
  • Osteonecrosis / physiopathology*
  • Osteonecrosis / prevention & control
  • Permeability / drug effects
  • Rabbits
  • Steroids / adverse effects*
  • Treatment Outcome
  • Vascular Endothelial Growth Factor A / metabolism*
  • src-Family Kinases / antagonists & inhibitors*
  • src-Family Kinases / metabolism

Substances

  • Steroids
  • Vascular Endothelial Growth Factor A
  • src-Family Kinases